<!DOCTYPE html>
<html>
	<head>
		<meta charser="utf-8">
		<title>button</title>
		<style>
			body{background-color:#666;
				text-align:center;}
			div{
				width:200px;
				height:80px;
				border:solid 5px red;
				text-align:center;
				line-height:80px;
				color:red;
				font-size:2em
			}
			.anniu:hover{color:white;
				background-color:#434;
				border:solid 5px white;
			}
			div
		</style>
	</head>
	<body>
		<div class="anniu">button</div>
	</body>
</html>